How does lexical scope affect closures in JavaScript?

Can you explain how lexical scope affects closures in JavaScript?

Sure! Lexical scope refers to the visibility of variables in nested functions. Closures are functions that remember their outer variables even when the outer function has finished executing.

Can you give me an example of a closure in JavaScript?

Absolutely! Here's a simple example:

function outerFunction() {
    let outerVariable = 'I am from outer scope!';
    function innerFunction() {
        console.log(outerVariable);
    }
    return innerFunction;
}

const closureFunction = outerFunction();
closureFunction(); // Outputs: I am from outer scope!

Why is it important to understand closures?

Understanding closures is crucial because they allow for data encapsulation and can help manage state in asynchronous programming.